freightliner WALK-IN VAN CHASSIS Operator's Manual page 51

3. Put the transmission in Park (P).
4. Apply the parking brake and make sure that it is
properly engaged.
5. Engage the Park (P) range by slowly releasing
the service brake.
6. Chock the rear tires and take any other steps
necessary to keep the vehicle from moving.
2000 Series
On vehicles with Allison 2000 series transmissions,
do the following steps if you have to leave the cab
with the engine running (for example, when checking
the transmission fluid):
Without Auto-Apply Parking Brake (PB)
Follow the instructions for vehicles with 1000 series
transmissions, under the heading "Without Park (P)
Position."
With Auto-Apply Parking Brake (PB)
1.
Bring the vehicle to a complete stop using the
service brake.
2. Ensure that the engine is at low idle rpm.
3. Put the transmission in Auto-Apply Parking Brake
(PB).
4. Ensure that the parking brake is properly en-
gaged.
5.
Chock the rear tires and take any other steps
necessary to keep the vehicle from moving.
2500 Series
On vehicles with 2500 series transmissions, instruc-
tions are as follows.
1. Bring the vehicle to a complete stop using the
service brake.
2.
Ensure that the engine is at low idle rpm.
3. Put the transmission in Park (P).
4. Apply the parking brake and make sure that it is
properly engaged.
5. Engage the Park (P) range by slowly releasing
the service brake.
6. Chock the rear tires and take any other steps
necessary to keep the vehicle from moving.
Range Inhibit Indicator, 2000 Series
A RANGE INHIBIT indicator is a standard feature of
the 2000 series transmissions. The RANGE INHIBIT
indicator comes on to alert the driver that transmis-
sion operation is being inhibited and that the range
shifts being requested by the driver may not occur.
When certain operating conditions are detected by
the TCM (transmission control module), the controls
will lock the transmission in the current operating
range.
Shift inhibits occur under the following conditions:
•
Shifts from Neutral (N) to Reverse (R) or from
Neutral (N) to a forward range when the en-
gine is above idle, greater than 900 rpm.
•
Forward/Reverse (R) directional shifts are typi-
cally not permitted if appreciable output shaft
speed is detected.
•
When some types of unusual transmission op-
erating conditions are detected by the TCM,
the TCM temporarily limits transmission opera-
tion until the vehicle can be driven to a service
location. When this type of situation is de-
tected, the TCM will lock the transmission in a
safe gear range.
Operating Instructions, On-Highway
Transmissions
Allison 1000/2000/2500 automatic transmissions are
electronically controlled and provide five or six for-
ward ranges and one Reverse (R) range. Typically, a
T-handle shift control is used by the driver to select
the ranges. See Fig. 5.1
Park (P) [optional on 1000 and 2500
Series]
Use Park (P) when starting or shutting down the en-
gine, to check vehicle accessories, and to operate
the engine in idle for longer than 5 minutes. This po-
sition places the transmission in Neutral (N) and en-
gages the park pawl.
Auto-Apply Parking Brake (PB) [optional
on 2000 Series]
The Auto-Apply Parking Brake (PB) places the ve-
hicle in Neutral (N) and applies the parking brake.
Transmissions
and Fig. 5.2.
5.2